1916, a mine sank the hospital ship , which left White Star Line with enough crew to work Justicia. White Star's engineer officers and men, unlike those of Cunard, were experienced with "combination machinery" such as that in Justicia. The shipping controller therefore transferred Justicia to the Oceanic Steam Navigation Company (White Star Line). However, the ship was not renamed to conform with White Star policy of giving its ships names ending with -ic. Justicia was completed in plain grey paint. On 7 April 1917 White Star Line took delivery of her. She was registered in Liverpool in 1917. Her UK official number was 137544 and her code letters were JPFL. Service and loss White Star Line ran Justicia across the North Atlantic, bringing troops to Liverpool first from Halifax, Nova Scotia and then from New York. At the beginning of 1918 she was painted with dazzle camouflage developed by Norman Wilkinson. She was attacked soon after, on 23 January 1918, by a German submarine in the North Channel, but no torpedo hit her, and she was undamaged. On 19 July 1918, Justicia left Belfast for New York, escorted by destroyers. She was unladen, and her Master was John David. 20 miles off Skerryvore, Scotland, hit her with one torpedo. Justicia developed a list, but the watertight doors in her bulkheads were closed in time and kept her afloat. UB-64 fired two torpedoes, but Justicias guns destroyed one of them, and the other missed. The tug Sonia took Justicia in tow, heading for Lough Swilly. UB-64 fired a fourth torpedo, but Justicias gunners destroyed it. UB-64 then fired a fifth torpedo, which hit Justicia but did not sink her. Part of Justicias crew was evacuated, and Sonia continued to tow her. The escorts damaged UB-64, which withdrew, but reported Justicias position via wireless telegraph. The next morning, 20 July, found Justicia and hit her amidships with two torpedoes, killing either 10 or 16 of her engine room crew (sources differ). Her surviving crew were evacuated, and by noon she rolled onto her starboard side and sank. The destroyers , , and depth charged UB-124, forcing her to the surface, and then sank her by gunfire. The German press celebrated the sinking. The Royal Navy held an inquiry to establish how the U-boats could have sunk a ship that was escorted by at least three destroyers. The inquiry concluded that the